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drm/amdgpu: check the GART table before invalidating TLB

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Bypass group programming (utcl2_harvest) aims to forbid UTCL2 to send
invalidation command to harvested SE/SA. Once invalidation command comes
into harvested SE/SA, SE/SA has no response and system hang.

This patch is to add checking if the GART table is already allocated before
invalidating TLB. The new procedure is as following:
1. Calling amdgpu_gtt_mgr_init() in amdgpu_ttm_init(). After this step GTT
   BOs can be allocated, but GART mappings are still ignored.
2. Calling amdgpu_gart_table_vram_alloc() from the GMC code. This allocates
   the GART backing store.
3. Initializing the hardware, and programming the backing store into VMID0
   for all VMHUBs.
4. Calling amdgpu_gtt_mgr_recover() to make sure the table is updated with
   the GTT allocations done before it was allocated.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Aaron Liu <aaron.liu@amd.com>
Acked-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Aaron Liu 2022-02-07 10:23:36 +08:00 committed by Alex Deucher
parent 6d53b115be
commit 29ba7b16b9
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
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@ -259,6 +259,9 @@ void amdgpu_gart_invalidate_tlb(struct amdgpu_device *adev)
{
int i;
if (!adev->gart.ptr)
return;
mb();
amdgpu_device_flush_hdp(adev, NULL);
for (i = 0; i < adev->num_vmhubs; i++)